Table 1.

Cell recovery and viability in both proficiency panels

	Donora	Mean P1/P2b	Median P1/P2	Minimum P1/P2	Maximum P1/P2
Cell recovery in 106 cells	1	12.5/11.5	12.0/12.0	6.8/1.0	26.4/18.8
	2	13.3/12.3	13.2/12.6	5.5/0.3	28.4/22.4
	3	13.1/12.8	13.6/12.8	6.7/1.7	25.1/24.3
	4	12.8/12.4	11.9/12.9	5.6/6.2	34.4/22.7
Viability (%)	1	88/85	89/89	48/58	100/98
	2	87/88	89/90	57/67	100/98
	3	91/87	93/90	54/69	100/100
	4	86/89	90/92	43/75	100/98

^aPBMCs from same donors and batches were used in both panels

^bP1/P2 refer to data from panel 1 (P1) and panel 2 (P2)